<style>
 .k-list-card{
     background-color:{{site.data.meng.card.background_color}};
 }
 .k-container.mdui-card{
     background-color:{{site.data.meng.card.background_color}};
 }
 .k-friend .mdui-card{
     background-color:{{site.data.meng.card.background_color}};
 }
 .k-post-media{
    opacity: {{site.data.meng.card.card_img_opacity}};
 }
</style>